Power-hammer.



Patented April 26, 1904.

ATENT OFFICE.

HENRY W. narnonn, or MASON orrr, IOWA.

POWER-HAMMER.

SPECIFICATION forming part of Letters Patent No. 758,361,11ated April 26, 1904.

Application filed Julyl, 1903.

T aZZ whom it iota/y concern:

Be it known that I, HENRY W. HATHORN, a citizen of the United States, residing at Mason City, in thecounty of Cerro Gordo and State of Iowa, have invented new and useful Improvements in Power-Hammers, of which the following is a specification.

This invention relates to power-hammers, the object in view being to provide a simple, reliable, and effective power-hammer the construction of which will give a perfect stroke adjustment for different thicknesses of work and which will also admit of the stroke being adjusted while the machine is running and without the necessity of stopping the operating mechanismj By the means hereinafter described the stroke of the hammer may be nicely adjusted and made shorter and shorter as the work performed approaches completion.

\Vith the above object in view the invention consists in the novel construction, combination, and arrangement of parts, as hereinafter fully described and illustrated and claimed.

In the accompanying drawings, Figure 1 is a side elevation of a hammer constructed in accordance with the present invention, and Fig. 2 is a vertical transverse section through the same.

Like reference-numerals designate corresponding parts in both figures of the drawings.

Referring to the drawings, it will be seen that the base is preferably composed of one or more I-beams 1', held together by suitable connections 2, and also having bolted thereto an upright frame 3, to which the helve4 is pivotally connected at 5 by means of a suitable bearing. At the opposite end of the base or head is arranged an anvil6. Con-.

nected to the free end of the helve is a hammer 7, while the opposite faces of the hammer and anvil are provided with suitable dies 8, set into the faces of the anvil and hammer, as shown in Fig. 1.

In carrying out the present invention the helve is provided at a point intermediate its ends with a curved slot 9, and Within said slot is fitted a bushing or lining l0, preferably of brass. Passing through the slot 9 is a pin or shaft 11, said pin being adjustable Serial No, 163,941. (No model."

lengthwise of the slot and being connected at its opposite ends to a yoke 12 in the form of a semicircular or harp-shaped spring. Connected centrally to the spring 12 is a clip 13, having a threaded shank 14:, which is engaged by a turnbuckle 15, which connects at its opposite end to the threaded stem 16 of a Strap 17,-whicl1 encircles an eccentric 18 on the slot 9, and this is accomplished Without stopping thelmachine by means of an adjusting-rod 22, provided at one end with an operating-handle 23 and connected at its opposite end to one arm of a lever 24, which is fulcrumed intermediate its ends at 25 on a suitable bracket 26, connected with the upright frame 3. A link 27 connects the opposite arm of the lever 24 with the harp-shaped spring or yoke 12, so that as the lever is vibrated said spring or yoke is moved in such manner as to carry the pin 11 lengthwise of the slot 9, When properly adjusted, the rod 22 may be held by bringing any one of a series of notches 28,formed in said rod, into engagement with'a lipor keeper 29, located for convenience on the anvil 6.

-When the hammer is not in operation, the

ing-belt operative, resort is had to a tensionpulley 30, carried by the arm 31 of a foot-lever 32, the end of which is in convenient reach of the operator and which is normally upheld by means of a spring 33.

In operation theattendant depresses the foot-lever and moves the tension-pulley so as to force the driving-band into engagement with the pulley 20. This drives the shaft 19 and through the medium of the eccentric and length of stroke of the hammer may be adjusted by pushing in or pulling out the adthe main driving-shaft 19 of the machine.

driving-belt 21 runs free. To render the drivlated by moving the pin 11 back and forth in other connections vibrates the helve 4. The

TOO

justing-rod 22, Which changes the position of the pin 11 in the slot 9, and this may be done Without stopping the machine The harpshaped spring or yoke 12 acts to cushion the stroke and adds materially to the life and durability of the machine as a Whole.

Having thus described the invention, What I claim as new is A power-hammer comprising a bed or base, an anvil mounted thereon, a lip formed on the anvil, an upright frame upon the base,

a bracket on the frame, a helve pivotally mounted on the frame and provided with a slot, a pin adjustable in said slot, a harp-shaped spring or yoke embracing the helve and connected with the opposite ends of said pin, a driving-shaft,a cam thereon, a strap encircling the cam, a turnbuckle connection between said strap and the yoke, a rod having a series of notches in one end adapted to engage the lip of the anvil and connected at its opposite end to a lever fulcrumed intermediate of its length to the bracket on the frame and a link connecting the lever to the yoke.

In testimony whereof I aflix my signature in presence of two Witnesses.

HENRY W. HATHORN. Witnesses:

A. N. BUMGARDNER, WM. H. HATHORN. 

